http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김영훈(Younghoon Kim),유현주(Hyunjoo Yu),정준하(Junha Jung) 한국아메리카학회 2015 美國學論集 Vol.47 No.2
This paper aims to reveal how American studies in Korea has evolved since 1969, focusing on the American Studies Association of Korea's Journal of American Studies (ISSN: 1226-3753). This paper does not introduce or evaluate the qualities of American studies in Korea. Rather, from a statistical point of view, it provides a quantitative evaluation over the academic orientations and trends of American studies in Korea, based on all the published articles and miscellaneous papers of Journal of American Studies from 1969 to 2014. The total number of articles and paper amounts to 935. We classified the 935 samples according to their languages (Korean and English), affiliations (institutions in Korea and institutions in foreign countries), academic topics (literature, popular culture, and social science), and types of writing (article, presidential addresses, reviews, etc). And, where relevant, we visualized our research results chronologically so as to foreground any historical change in the research trends of American studies in Korea. The major findings are as follows: 1) Despite few contributions from foreign scholars, from the 1970s to 1990s, the English language was the dominant academic language for American studies in Korea; 2) Our analysis of the author affiliations reveals that American studies in Korea is predominantly centered on the Seoul Capital Area; 3) The proportion of social science studies in the journal was higher than literature and popular culture until 1990; 4) The major academic research interests of American studies in Korea are oriented to literature, political science and history. In short, since 1969, American studies in Korea has been led and dominated by Korean scholars in the Seoul Capital Area whose academic interests are mainly literature, political science or history, and the majority of those scholars published their articles in English. Since its beginning in 1969, the American Studies Association of Korea's Journal of American Studies has contributed greatly to the quantitative and qualitative growth of American studies in Korea. When provided with quantitative evaluation of the journal's publications, we can have a more balanced understanding not only of the journal's academic orientation but also of American studies in Korea in general.
A Tabu Heuristic for Multi-Trip Vehicle Routing Problem with Time Windows
Li Delong,YoungHoon Yu,Geun Sik Jo 한국멀티미디어학회 2009 한국멀티미디어학회 학술발표논문집 Vol.2009 No.2
Vehicle Routing Problems (VRP) arise in many real-life applications within transportation and logistics. This paper describes a novel tabu search heuristic methodology for the Muilt-Trip Vehicle Routing Problem with Time Windows(MTVPTW). Unlike the classical vehicle routing problem, the MTVPTW permits vehicles to make multiple trips and from a central depot within a given time duration to serve(pick up/ delivery) a number of customers, each customer must be done within a time window; the drivers’ schedules must respect the maximum legal travelling time and minimum legal waiting time; the unloading time is considered. We present results of our algorithm on standard data sets such as solomon data and outline plans to improve upon these solutions.
Molecularly Engineered Surface Triboelectric Nanogenerator by Self-Assembled Monolayers (METS)
Song, Giyoung,Kim, Younghoon,Yu, Seunggun,Kim, Min-Ook,Park, Sang-Hee,Cho, Suk Man,Velusamy, Dhinesh Babu,Cho, Sung Hwan,Kim, Kang Lib,Kim, Jongbaeg,Kim, Eunkyoung,Park, Cheolmin American Chemical Society 2015 Chemistry of materials Vol.27 No.13
<P>Self-powered energy harvesters utilizing triboelectric effect and electrostatic induction have been widely studied, leading in the materials viewpoint to numerous material pairs for facile charge separation upon repetitive contacts with elaborate topological structures. Here, we present a simple but robust triboelectric platform based on a molecularly engineered surface triboelectric nanogenerator by self-assembled monolayers (METS). Triboelectric surface charge density of a substrate was readily controlled by the variation of end-functional groups of self-assembled monolayers (SAMs). In particular, by employing fluorine terminated SAMs, we are able to develop a METS with the maximum open circuit voltage and short circuit current of 105 V and 27 μA, respectively, under relatively gentle mechanical contacts with the 3N vertical force at 1.25 Hz. The power density of the device was 1.8 W/m<SUP>2</SUP> at the load resistance of 10 MΩ more than 60 times greater than that of an unmodified dielectric/Al device. Moreover, our approach with SAMs was extended to various types of surfaces including fabrics of silk, cotton, and poly(ethylene terephthalate) (PET) and a PET film, and the results of single-friction-surface triboelectric nanogenerators with these materials offers a facile and universal guideline for designing triboelectic materials.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cmatex/2015/cmatex.2015.27.issue-13/acs.chemmater.5b01507/production/images/medium/cm-2015-01507p_0001.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/cm5b01507'>ACS Electronic Supporting Info</A></P>
Neuroprotective effects of Banha-sasim-tang on scopolamine-induced memory deficits in mice
Malk Eun Pak,Yu-Chang Oh,Yeo-jin Park,Jae Kwang Kim,Buyun Kim,Hye Jin Yang,Wei Li,Younghoon Go 한국실험동물학회 2021 한국실험동물학회 학술발표대회 논문집 Vol.2021 No.7
Since ancient times, Banha-sasim-tang (BHS), has been used to treat functional dyspepsia in East Asia. The purpose of our study was to determine if BHS protect hippocampal neuron against scopolamine-induced memory dysfunction and oxidative stress. We investigated the functional effect of BHS in scopolamine-induced mouse model and its molecular analysis was performed in glutamate-induced HT22 cell. Behavior tests were performed Morris water maze test to test spatial memory in mice. The cholinergic system activity and survival-related molecules were examined in the hippocampus by enzyme-linked immunosorbent, western blot, and immunohistochemistry assay. BHS treated mice ameliorated memory dysfunction by scopolamine injection in the Morris water maze test. BHS treatment increased acetylcholine level and decreased neuronal death compared to scopolamine-induced mice. Also, decreased anti-apoptotic protein, Bcl-2 expression in scopolamine was increased by BHS treatment. The decreased extra cellular signal-regulated kinase (ERK), cAMP response element-binding protein (CREB) expression by scopolamine injection were increased by BHS treatment. BHS has beneficial effects against scopolamine-induced memory deficits, which are exerted via modulation of the cholinergic system as well as the ERK/CREB signaling pathway. Therefore, BHS may be useful therapeutic agent for disease associated with memory impairment.